剛無聊看到群里一位朋友在提問，大晚上沒人解答，遂自己默默打開了VS，敲起了代碼。
問題：請問怎么將集合newFoods中Name含有"包子"的Number+1，LINQ可以一句話寫出來 ?
List<Food> newFoods = new List<Food>{ new Food { Money = 10, Name = "天津包子", Number=1 }, new Food { Money = 10, Name = "狗不理包子", Number = 1 }, new Food { Money = 10, Name = "小籠包子", Number = 1 }, new Food { Money = 10, Name = "饅頭", Number = 1 }, new Food { Money = 10, Name = "粽子", Number = 1 }};
我先是敲了一下正常的寫法，很快出來了。
但是用Linq一直不知道該怎么寫，反而越寫越麻煩，還想出準備先篩選出一個對象，再把兩個對象合并的傻辦法。
后來發現原來select里是可以直接查詢完返回原對象的。之前用Linq一直以為只能是 model.Select(o=>o.PRoperty==xxx) 這樣用，也沒去深究，看來是修為不夠。
1樓給出的代碼更加簡潔快速，Linq真是方便
最后的代碼：
1 #region 2 public class Food 3 { 4 public string Name { get; set; } 5 public int Money { get; set; } 6 public int Number { get; set; } 7 } 8 static void Example1() 9 {10 List<Food> newFoods = new List<Food>{11 new Food { Money = 10, Name = "天津包子", Number=1 },12 new Food { Money = 10, Name = "狗不理包子", Number = 1 },13 new Food { Money = 10, Name = "小籠包子", Number = 1 },14 new Food { Money = 10, Name = "饅頭", Number = 1 },15 new Food { Money = 10, Name = "粽子", Number = 1 }16 };17 //Linq寫法118 newFoods.ForEach(o =>19 {20 o.Number = o.Name.Contains("包子") ? o.Number + 1 : o.Number;21 });22 //Linq寫法223 newFoods = newFoods.Select(o =>24 {25 o.Number = o.Name.Contains("包子") ? o.Number + 1 : o.Number;26 return o;27 }).ToList();28 //普通寫法29 for (int i = 0; i < newFoods.Count; i++)30 {31 newFoods[i].Number = newFoods[i].Name.Contains("包子") ? newFoods[i].Number + 1 : newFoods[i].Number;32 }33 //遍歷輸出34 foreach (Food food in newFoods)35 {36 Console.WriteLine("名稱：" + food.Name + ",價格：" + food.Money + ",數量：" + food.Number);37 }38 Console.ReadLine();39 }40 #endregion
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